Symbiotic Relationships and Microbiomes

The video explains symbiosis, a close relationship between different species, focusing on mutualism, commensalism, and parasitism. Mutualism benefits both organisms, as seen in the microbiome, termites, and yucca moths. Commensalism benefits one organism without affecting the other, exemplified by hermit crabs, mites, and orchids. Parasitism benefits one organism at the expense of the other, with examples like lampreys, worms, and a fungus affecting ants.

What is the term for a close, long-term relationship between two or more different species?

• Parasitism

• Symbiosis

• Mutualism

• Commensalism

In which type of symbiotic relationship do both organisms benefit?

• Commensalism

• None of the above

• Mutualism

• Parasitism

What is the role of the microbiome in humans?

• None of the above

• Produces oxygen

• Helps break down carbohydrates and toxins

• Causes diseases

Which organism helps termites digest cellulose?

• Viruses

• Fungi

• Bacteria

• Protozoa

What would happen to the yucca plant without the yucca moth?

• It would become a commensal

• It would thrive

• It would lose an important pollinator

• It would become a parasite

What is an example of commensalism?

• Yucca moth and yucca plant

• Hermit crabs in snail shells

• Tapeworms in intestines

• Lampreys on fish

How do mites benefit from riding on flies?

• They reproduce

• They harm the flies

• They get transportation and a place to live

• They get food

Which type of symbiotic relationship involves one organism benefiting while the other is neither helped nor harmed?

• Parasitism

• None of the above

• Mutualism

• Commensalism

What is a common consequence for the host in a parasitic relationship?

• The host benefits

• The host becomes a parasite

• The host is harmed

• The host is neither helped nor harmed

What unusual behavior does the fungus cause in infected ants?

• The ants start flying

• The ants leave the nest and attach to a leaf

• The ants become larger

• The ants become aggressive